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SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Sales, Net of Collection Allowance) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, net of contractual allowances and adjustments | $ 4,507 | $ 3,645 | $ 7,985 | $ 6,474
Allowance for credit losses | (66) | (112) | (112) | (124)
Net sales | 4,441 | 3,533 | 7,873 | 6,350
Medicaid [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Allowance for credit losses |  |  | (9) |
Medicare [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Allowance for credit losses |  |  | (39) |
Third-Party Payers [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Allowance for credit losses |  |  | (61) |
Service revenue, net [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, net of contractual allowances and adjustments | 3,909 | 2,768 | 6,730 | 4,836
Allowance for credit losses | (66) | (112) | (112) | (124)
Net sales | 3,843 | 2,656 | 6,618 | 4,712
Service revenue, net [Member] | Medicaid [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, net of contractual allowances and adjustments | 20 | 5 | 25 | 13
Allowance for credit losses | (7) | (2) | (9) | (6)
Net sales | 13 | 3 | 16 | 7
Service revenue, net [Member] | Medicare [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, net of contractual allowances and adjustments | 1,525 | 1,165 | 2,616 | 2,045
Allowance for credit losses | (23) | (23) | (39) | (23)
Net sales | 1,502 | 1,142 | 2,577 | 2,022
Service revenue, net [Member] | Self-Pay |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, net of contractual allowances and adjustments | 14 | 36 | 32 | 116
Allowance for credit losses | (1) | (4) | (3) | (12)
Net sales | 13 | 32 | 29 | 104
Service revenue, net [Member] | Third-Party Payers [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, net of contractual allowances and adjustments | 2,348 | 1,562 | 4,053 | 2,662
Allowance for credit losses | (35) | (83) | (61) | (83)
Net sales | 2,313 | 1,479 | 3,992 | 2,579
Service revenue, net [Member] | Contract Diagnostic Services [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, net of contractual allowances and adjustments | 2 |  | 4 |
Net sales | 2 |  | 4 |
Product [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, net of contractual allowances and adjustments | 598 | 877 | 1,255 | 1,638
Net sales | $ 598 | $ 877 | $ 1,255 | $ 1,638

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